<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图 -->
    <el-card>
      <!-- 添加角色按钮区域 -->
      <el-row>
        <el-col>
          <el-button type="primary" @click="addDialogVisible = true"
            >添加角色</el-button
          >
        </el-col>
      </el-row>
      <!-- 角色列表区域 -->
      <el-table :data="rolelist" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">
            <template slot-scope="scope">
                <el-row :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']" v-for="(item1, i1) in scope.row.children" :key="item1.id">
                    <!-- 渲染一级权限 -->
                    <el-col :span="5">
                        <el-tag closable @close="removeRightById(scope.row,item1.id)">{{item1.authName}}</el-tag>
                        <i class="el-icon-caret-right"></i>
                    </el-col>
                    <!-- 渲染二三级权限 -->
                    <el-col :span="19">
                        <!-- 通过for循环嵌套渲染二级权限 -->
                        <el-row :class="[ i2 === 0 ? '' : 'bdtop', 'vcenter']" v-for="(item2, i2) in item1.children" :key="item2.id" closable @close="removeRightById(scope.row,item2.id)">
                            <el-col :span="6">
                                <el-tag type="success">{{item2.authName}}</el-tag>
                                <i class="el-icon-caret-right"></i>
                            </el-col>
                            <!-- 三级权限 -->
                            <el-col :span="18">
                                <el-tag type="warning" v-for="(item3) in item2.children" :key="item3.id" closable @close="removeRightById(scope.row,item3.id)">
                                    {{item3.authName}}
                                </el-tag>
                            </el-col>
                        </el-row>
                    </el-col>
                </el-row>
                <!-- <pre>
                    {{scope.row}}
                </pre> -->
            </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column label="序号" type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row.id)"
              >编辑</el-button
            >
            <el-button type="danger" icon="el-icon-delete" size="mini" @click="removeUserById(scope.row.id)"
              >删除</el-button
            >
            <el-button type="warning" icon="el-icon-setting" size="mini" @click="showSetRightDialog(scope.row)"
              >分配权限</el-button
            >
          </template>
        </el-table-column>
      </el-table>
    </el-card>

    <!-- 添加角色对话框 -->
    <el-dialog
      title="添加角色"
      :visible.sync="addDialogVisible"
      width="50%"
      @close="addDialogClose"
    >
      <!-- 内容主题区域 -->
      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="80px"
      >
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="addForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="addForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <!-- 底部按钮区域 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addUser">确 定</el-button>
      </span>
    </el-dialog>
        <!-- 修改用户的对话框 -->
    <el-dialog title="编辑角色" :visible.sync="editDialogVisible" width="50%" @close="editDialogClosed">
      <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="70px">
        <el-form-item label="角色名称" prop="roleName">
        <el-input v-model="editForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
        <el-input v-model="editForm.roleDesc" ></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editUserInfo"
          >确 定</el-button
        >
      </span>
    </el-dialog>

    <!-- 分配权限的对话框 -->
    <el-dialog
        title="分配权限"
        :visible.sync="setRightDialogVisible"
        width="50%"
        @close="setRightDialogClosed"
    >
    <!-- 树形控件 -->
    <el-tree :data="rightslist" :props="treeProps" show-checkbox node-key="id" default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>
    <span slot="footer" class="dialog-footer">
            <el-button @click="setRightDialogVisible = false">取 消</el-button>
            <el-button type="primary" @click="allotRights">确 定</el-button>
    </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      // 所有角色列表数据
      rolelist: [],
      // 控制添加用户对话框的显示与隐藏
      addDialogVisible: false,
      // 添加用户的表单数据
      addForm: {
        roleName: '',
        roleDesc: ''
      },
      // 添加表单的验证规则对象
      addFormRules: {
        roleName: [
          { required: true, message: '请输入角色', trigger: 'blur' },
          {
            min: 2,
            max: 10,
            message: '角色名的长度在3-10个字符之间',
            trigger: 'blur'
          }
        ],
        roleDesc: [
          { required: true, message: '请输入角色的描述', trigger: 'blur' },
          {
            min: 3,
            max: 30,
            message: '角色名的长度在15-30个字符之间',
            trigger: 'blur'
          }
        ]
      },
      // 控制修改用哪个户对话框的显示与隐藏
      editDialogVisible: false,
      // 查询到的用户对象信息
      editForm: {},
      // 修改表单验证规则对象
      editFormRules: {
        roleName: [
          { required: true, message: '请输入修改的邮箱', trigger: 'blur' },
          {
            min: 3,
            max: 10,
            message: '角色名的长度在3-10个字符之间',
            trigger: 'blur'
          }
        ],
        roleDesc: [
          { required: true, message: '请输入修改的手机号', trigger: 'blur' },
          {
            min: 3,
            max: 30,
            message: '角色名的长度在15-30个字符之间',
            trigger: 'blur'
          }
        ]
      },
      //   控制分配权限的对话框的显示与隐藏
      setRightDialogVisible: false,
      //  所有权限的集合
      rightslist: [],
      //  树形控件的属性绑定对象
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      //  默认选中的权限id值
      defKeys: [],
      //  当前即将分配权限的角色ID
      roleId: ''
    }
  },
  created() {
    this.getRolesList()
  },
  methods: {
    //   获取角色列表
    async getRolesList() {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败!')
      }
      this.rolelist = res.data
    },
    // 点击按钮,添加新用户
    addUser() {
    // 表单预验证
      this.$refs.addFormRef.validate(async (valid) => {
        // console.log(valid)
        if (!valid) return false
        // 可以添加用户的网络请求
        const { data: res } = await this.$http.post('roles', this.addForm)
        if (res.meta.status !== 201) {
          this.$message.error('添加用户失败!')
        }
        this.$message.success('添加用户成功!')
        // 添加用户的对话框
        this.addDialogVisible = false
        // 重新获取列表
        this.getRolesList()
      })
    },
    // 监听添加对话框的关闭事件
    addDialogClose() {
      this.$refs.addFormRef.resetFields()
    },
    // 监听编辑对话框的关闭事件
    editDialogClosed() {
      this.$refs.editFormRef.resetFields()
    },
    // 修改用户信息并提交
    editUserInfo() {
      // 表单预验证
      this.$refs.editFormRef.validate(async valid => {
        if (!valid) return false
        // 发起修改用户请求
        const { data: res } = await this.$http.put('roles/' + this.editForm.roleId,
          {
            roleName: this.editForm.roleName,
            roleDesc: this.editForm.roleDesc
          })
        if (res.meta.status !== 200) {
          return this.$message.error('更新用户失败!')
        }
        // 关闭对话框
        this.editDialogVisible = false
        // 刷新数据列表
        this.getRolesList()
        // 提示修改成功
        this.$message.success('用户更新成功!')
      })
    },
    // 展示编辑用户的界面
    async showEditDialog(roleId) {
      const { data: res } = await this.$http.get('roles/' + roleId)
      if (res.meta.status !== 200) {
        return this.$message.error('查询用户信息失败!')
      }
      this.editForm = res.data
      this.editDialogVisible = true
    },
    // 根据Id删除对应的用户信息
    async removeUserById(id) {
      // 弹框确认用户是否删除
      const confirmResult = await this.$confirm('此操作将会把该用户从黑白喵子管理后台中剔除, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      // 如果用户确认删除,则返回值为字符串 confirm
      // 如果用户取消删除,则返回值为字符串 cancel
      if (confirmResult !== 'confirm') {
        return this.$message.info('黑白喵子与你同在!')
      }
      const { data: res } = await this.$http.delete('roles/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('删除用户失败!')
      }
      this.$message.success('黑白喵子期待与你再次相遇!')
      this.getRolesList()
    },
    // 根据Id删除对应的权限
    async removeRightById(role, rightId) {
    // 弹框提示用户是否删除
      const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      if (confirmResult !== 'confirm') {
        return this.$message.info('取消删除!')
      }
      const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
      if (res.meta.status !== 200) {
        return this.$message.error('删除权限失败!')
      }
      this.$message.success('删除权限成功!')
      //   this.getRolesList()
      role.children = res.data
    },
    // 展示分配权限的对话框
    async showSetRightDialog(role) {
      this.roleId = role.id
      // 获取所有权限的数据
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) {
        return this.$message.error('获取数据失败!')
      }
      console.log(res.data)
      // 把获取的权限数据保存到rightslist
      this.rightslist = res.data
      this.setRightDialogVisible = true
      //  递归获取三级节点的Id
      this.getLeafKeys(role, this.defKeys)
    },
    // 通过递归的形式,获取角色下所有三级权限的id,并保存到defKeys数组中
    getLeafKeys(node, arr) {
      // 如果当前node节点,不包含children属性,则是三级节点
      if (!node.children) {
        return arr.push(node.id)
      }
      node.children.forEach(item => this.getLeafKeys(item, arr))
    },
    // 监听分配权限对话的关闭事件
    setRightDialogClosed() {
      this.defKeys = []
    },
    // 点击为角色分配权限
    async allotRights() {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      //  返回一个字符串,并用逗号隔开
      const idStr = keys.join(',')
      console.log(idStr)
      const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })
      if (res.meta.status !== 200) {
        return this.$message.error('分配权限失败!')
      }
      this.$message.success('分配权限成功!')
      this.getRolesList()
      this.setRightDialogVisible = false
    }
  }
}
</script>

<style lang="less" scoped>
.el-tag{
    margin: 7px;
}
.bdtop {
    border-top: 1px solid #ccc;
}
.bdbottom {
    border-bottom: 1px solid #ccc;
}
.vcenter {
    display: flex;
    align-items: center;
}
</style>
